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数学
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2x+y=4x-y-1/2=10+6x+2y/4
其中是 二分之4x-y-1 四分之10+6x+2y
人气：349 ℃ 时间：2020-02-04 01:41:24
解答
2x+y=（4x-y-1）/2=（10+6x+2y）/4
4x+2y=4x-y-1 8x+4y=10+6x+2y
3y=-1 2x+2y=10 x+y=5
y=-1/3x=16/3
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